Getting the List of Installed softwares from the local system

Here is the sample code to get the list of softwares installed in the system.


const uint HKEY_LOCAL_MACHINE = unchecked((uint)0x80000002);
ManagementClass wmiRegistry = new ManagementClass("root/default",
"StdRegProv", null);
//Enumerate subkeys
string keyPath = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
object[] methodArgs = new object[] { HKEY_LOCAL_MACHINE, keyPath, null };
uint returnValue = (uint)wmiRegistry.InvokeMethod("EnumKey", methodArgs);
MessageBox.Show("Executing EnumKey() returns: " + returnValue);
if (null != methodArgs[2])
{
string[] subKeys = methodArgs[2] as String[];
if (subKeys == null) return;
ManagementBaseObject inParam =
wmiRegistry.GetMethodParameters("GetStringValue");
inParam["hDefKey"] = HKEY_LOCAL_MACHINE;
string keyName = "";

foreach (string subKey in subKeys)
{
//Display application name
keyPath = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\" +
subKey;
keyName = "DisplayName";
inParam["sSubKeyName"] = keyPath;
inParam["sValueName"] = keyName;
ManagementBaseObject outParam =
wmiRegistry.InvokeMethod("GetStringValue", inParam, null);

if ((uint)outParam["ReturnValue"] == 0)
{
listBox1.Items.Add(outParam["sValue"]);
}
}
}